161150761 has 6 divisors (see below), whose sum is σ = 170079162. Its totient is φ = 152668800.

The previous prime is 161150753. The next prime is 161150779. The reversal of 161150761 is 167051161.

It can be written as a sum of positive squares in only one way, i.e., 138768400 + 22382361 = 11780^2 + 4731^2 .

It is not a de Polignac number, because 161150761 - 2³ = 161150753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161150791) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 222840 + ... + 223561.

It is an arithmetic number, because the mean of its divisors is an integer number (28346527).

Almost surely, 2^161150761 is an apocalyptic number.

It is an amenable number.

161150761 is a deficient number, since it is larger than the sum of its proper divisors (8928401).

161150761 is an equidigital number, since it uses as much as digits as its factorization.

161150761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446439 (or 446420 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 28.

The square root of 161150761 is about 12694.5169659976. The cubic root of 161150761 is about 544.1819345787.

The spelling of 161150761 in words is "one hundred sixty-one million, one hundred fifty thousand, seven hundred sixty-one".